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Full text of "Text Book Of Mechanical Engineering"

i8

Another Method for Bend.

together to form the mould, with the exception of the tl
layer on the internal core, which must first be removed, ;
two half cores taken off the plate and put back to bac
forming a complete central core. The whole mould is
at Fig. 26, the bent part of the core being supported by a
given in detail at K ; being a bent, tinned, plate.

It must be quite understood that if many castings are r<
the above operation would not be performed, as a patten
give more expeditious results.

N

A slightly different, but more usual way of moulding
bend, is to cast two plates, as at L, Fig. 2 6A, from a
pattern of the shape of the pipe, a little margin being left:
side, the figure being for a pipe having flanges at the end!
template takes the form M, and has a few nails driven in